Are you sure he said that? - Well, not word for word, but I gave you the the gist of it.¿Estás seguro de que dijo eso? - Pues, no palabra por palabra, pero te conté lo esencial.
Don't try to write down what the professor says word for word. Just write down the main ideas, or else you won't be able to keep up.No intentes anotar textualmente lo que dice el profesor. Solo anota las ideas principales; si no, no podrás seguir el ritmo.